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Finding the Fourth Proportional to 107,487.40, 161,036.70 and 87,658.60

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Solution

The fourth proportional to 107,487.40, 161,036.70 and 87,658.60 is: 131,329.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,487.40 : 161,036.70 = 87,658.60 : x
  2. Step 2: Convert to fraction form
    107,487.40/161,036.70 = 87,658.60/x
  3. Step 3: Cross multiply
    107,487.40x = 161,036.70 × 87,658.60
  4. Step 4: Simplify right side
    107,487.40x = 14,116,251,670.62
  5. Step 5: Solve for x
    x = 14,116,251,670.62/107,487.40
  6. Step 6: Final answer
    x = 131,329.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.